[v10.2.x] Plugins: Fix status_source always being "plugin" in plugin request logs (#77436)

Plugins: Fix status_source always being "plugin" in plugin request logs (#77433)

* Plugins: Fix status_source always being "plugin" in plugin logs

* add tests

* Fix TestInstrumentationMiddlewareStatusSource

(cherry picked from commit 46261de32d)

Co-authored-by: Giuseppe Guerra <giuseppe.guerra@grafana.com>

pkg/services/pluginsintegration/clientmiddleware/plugin_request_meta_middleware_test.go

@@ -0,0 +1,40 @@
+package clientmiddleware
+
+import (
+	"context"
+	"testing"
+
+	"github.com/grafana/grafana-plugin-sdk-go/backend"
+	"github.com/stretchr/testify/require"
+
+	"github.com/grafana/grafana/pkg/plugins"
+	"github.com/grafana/grafana/pkg/plugins/manager/client/clienttest"
+	"github.com/grafana/grafana/pkg/plugins/pluginrequestmeta"
+)
+
+func TestPluginRequestMetaMiddleware(t *testing.T) {
+	t.Run("default", func(t *testing.T) {
+		cdt := clienttest.NewClientDecoratorTest(t,
+			clienttest.WithMiddlewares(NewPluginRequestMetaMiddleware()),
+		)
+		_, err := cdt.Decorator.QueryData(context.Background(), &backend.QueryDataRequest{})
+		require.NoError(t, err)
+		ss := pluginrequestmeta.StatusSourceFromContext(cdt.QueryDataCtx)
+		require.Equal(t, pluginrequestmeta.StatusSourcePlugin, ss)
+	})
+
+	t.Run("other value", func(t *testing.T) {
+		cdt := clienttest.NewClientDecoratorTest(t,
+			clienttest.WithMiddlewares(plugins.ClientMiddlewareFunc(func(next plugins.Client) plugins.Client {
+				return &PluginRequestMetaMiddleware{
+					next:                next,
+					defaultStatusSource: "test",
+				}
+			})),
+		)
+		_, err := cdt.Decorator.QueryData(context.Background(), &backend.QueryDataRequest{})
+		require.NoError(t, err)
+		ss := pluginrequestmeta.StatusSourceFromContext(cdt.QueryDataCtx)
+		require.Equal(t, pluginrequestmeta.StatusSource("test"), ss)
+	})
+}